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| Content Provider | Springer Nature Link |
|---|---|
| Author | Yu, Jian Yan, Chao Jiang, ZhenHua |
| Copyright Year | 2017 |
| Abstract | A discontinuous Galerkin method based on an artificial viscosity model is investigated in the context of the simulation of compressible turbulence. The effects of artificial viscosity on shock capturing ability, broadband accuracy and under-resolved instability are examined combined with various orders and mesh resolutions. For shock-dominated flows, the superior accuracy of high order methods in terms of discontinuity resolution are well retained compared with lower ones. For under-resolved simulations, the artificial viscosity model is able to enhance stability of the eighth order discontinuous Galerkin method despite of detrimental influence for accuracy. For multi-scale flows, the artificial viscosity model demonstrates biased numerical dissipation towards higher wavenumbers. Capability in terms of boundary layer flows and hybrid meshes is also demonstrated. It is concluded that the fourth order artificial viscosity discontinuous Galerkin method is comparable to typical high order finite difference methods in the literature in terms of accuracy for identical number of degrees of freedom, while the eighth order is significantly better unless the under-resolved instability issue is raised. Furthermore, the artificial viscosity discontinuous Galerkin method is shown to provide appropriate numerical dissipation as compensation for turbulent kinetic energy decaying on moderately coarse meshes, indicating good potentiality for implicit large eddy simulation. |
| Starting Page | 1032 |
| Ending Page | 1049 |
| Page Count | 18 |
| File Format | |
| ISSN | 16747321 |
| Journal | Science in China Series E: Technological Sciences |
| Volume Number | 60 |
| Issue Number | 7 |
| e-ISSN | 18691900 |
| Language | English |
| Publisher | Science China Press |
| Publisher Date | 2017-03-14 |
| Publisher Place | Beijing |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | discontinuous Galerkin method artificial viscosity compressible turbulence implicit large eddy simulation Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Engineering Materials Science |
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